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Laser induced collisional energy transfer in Sr–Li system |
| Chen De-Ying (陈德应)a, Lu Zhen-Zhong (鲁振中)a, Fan Rong-Wei (樊荣伟)a, Xia Yuan-Qin (夏元钦)a, Zhou Zhi-Gang (周志刚)a, Ji Yi-Qin (季一勤 )b |
a National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150001, China;
b Tianjin Key Laboratory of Optical Thin Films, Tianjin Jinhang Institute of Technical Physics, Tianjin 300192, China |
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Abstract A four-state model with considering the relative velocity distribution function for calculating the cross section of laser-induced collisional energy transfer in Sr-Li system is presented and profiles of laser induced collision cross section are obtained. The resulting spectra obtained from different intermediate states are strongly asymmetrical in an opposite asymmetry. Both of the two intermediate states have contributions to the finial state, and none of the intermediate states should be neglected. The peak of the laser-induced collisional energy transfer (LICET) profile shifts toward the red and the FWHM becomes narrower obviously with laser field intensity increasing. A cross section of 1.2× 10-12 cm2 at a laser field intensity of 2.17× 107 V/m is obtained, which indicates that this collision process can be an effective way to transfer energy selectively from a storage state to a target state. The existence of saturation for cross section with the increase of the laser intensity shows that the high-intensity redistribution of transition probabilities is an important feature of this process which is not accounted for in a two-state treatment.
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Received: 12 December 2011
Revised: 19 January 2012
Accepted manuscript online:
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PACS:
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32.70.Jz
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(Line shapes, widths, and shifts)
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34.50.-s
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(Scattering of atoms and molecules)
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Corresponding Authors:
Chen De-Ying
E-mail: luhit@126.com
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Cite this article:
Chen De-Ying (陈德应), Lu Zhen-Zhong (鲁振中), Fan Rong-Wei (樊荣伟), Xia Yuan-Qin (夏元钦), Zhou Zhi-Gang (周志刚), Ji Yi-Qin (季一勤 ) Laser induced collisional energy transfer in Sr–Li system 2012 Chin. Phys. B 21 083202
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